APA (7th ed.) Zitazioa

Pepper, D. (1984). The roots of modern environmentalism. Routledge.

Chicago Style (17th ed.) Zitazioa

Pepper, David. The Roots of Modern Environmentalism. London: Routledge, 1984.

MLA (9th ed.) Zitazioa

Pepper, David. The Roots of Modern Environmentalism. Routledge, 1984.